Pro Mouse

iTrader: (15)

I was wondering how to read numbers,in colunms 400 ,800 and 1200 what is the lower the number mean ,more air or more fuel? TIA

P Mack

iTrader: (6)

The numbers are percentages. If you have a 6.0 liter engine running at 50% volumetric efficiency, it will flow 3.0 liters of air every two revolutions. If you put in a lower number, you are telling the computer to expect less air, and therefore to add less fuel.

Pro Mouse

iTrader: (15)

Hey Thanks for the Info PMack....

2MuchRiceMakesMeSick

So when I make changes on step #4, does it really mean multiply? or do I multiply .60 which would be 60% of the value?

1. Idle Limiters --> Idle Speed: 950
2. Idle Limiters --> IAC Park Position: Raise all points from 40C and up to 21
3. Idle Limiters --> Idle Air In Gear: All points 60C and up to 8.6
4. Fuel --> Main VE Table: Multiply column 400 rpm by 60. Multiply column 800 by 80. 5. Multiply column 1200 by 90.
5. Ignition --> High Octane Table: Add 2 deg to all points 400 to 1000 RPM, .08 to .32 g/sec

P Mack

iTrader: (6)

Yeah multiply by .6, .8 and .9 because you will have less airflow at those rpms with a big cam. Those are just to get you in the ballpark though, they're not exact.

marc_w

P Mack, Did you have to make many changes in your VE for your C1?

I've been taking some advise I've seen passed around regarding cams and low RPM VE changes, and my truck seems to idle best with almost stock tuning. I've tried VE changes as low as 70, 80, 90 percent, and as high as 90 and 95 for just the 400 and 800 columns.

It could be the fact that I'm running a cam with a very minimal amount of bolt-ons, so the true effects from a cam this size aren't felt as strong as full bolt-on motors.

P Mack

iTrader: (6)

I think i multiplied like .85 for 400 and .95 for 800 since it's a pretty small cam. It starts up instantly and my ltrims are pretty close to zero at idle so i'm leaving it alone. I did make some changes in the upper rpms too but that is a different story.

marc_w

Sounds good. I'm wondering if the extra size of my motor swallows up the little '220 even more. I have no starting issues at all on stock programming. If I do mod anything to the leaner side, my cold starts actually get a little erratic.

2MuchRiceMakesMeSick

Thanks, Now I understand. Can you explain what step 5 means? I am assuming that in hptuners I just add 2 to each value? Is there anything else that I should change in order to get this trex running in my A4. Im not looking for perfect, just enough to drive it without fouling out the plugs. Thanks in advance
My table looks like this
------------------------------------------------------
. . . . . . . . .400 . . .600 . .800 . .1000
0.08 g/cyl . . .11 . . .18 . . .24 . . .30
0.12 g/cyl . . .11 . . .18 . . .11 . . .30
0.16 g/cyl . . .11 . . .18 . . .24 . . .30
0.20 g/cyl . . .11 . . .18 . . .24 . . .30
0.24 g/cyl . . .10 . . .18 . . .25 . . .31
0.28 g/cyl . . .12 . . .18 . . .23 . . .28
0.32 g/cyl . . .14 . . .21 . . .22 . . .27
-------------------------------------------------------
5. Ignition --> High Octane Table: Add 2 deg to all points 400 to 1000 RPM, .08 to .32 g/sec

BuckeyeROC

iTrader: (7)

Not to highjack your post man, but I'm trying to do the same thing with the same cam (T-rex) w/ an M6. I set my target idle at 1000 rpm. Should I still do this: "Main VE Table: Multiply column 400 rpm by 60%. Multiply column 800 by 80%. Multiply column 1200 by 90%." Or since my target idle is 1000 rpm, should I do 1200 by 60%, 1600 by 80%? Or 1200 by 80% and 1600 by 90%? Or is this TOO much?

Also, my VE tables are in kPa, not g/cyl. Does this make any difference for the %'s to change these? I too am worried about fouling plugs.

2MuchRiceMakesMeSick

I am installing it tomarrow (technically in about 5 hours). I did that to mine, I will let you know if it worked out.

Can anyone answer the previous question I had about step #5 please?

Pro Mouse

iTrader: (15)

You are not Highjacking my post manany info Is Kickass!So you mean to tell me I need to change my 1600 numbers say multiply by 90% ? Maybe this is my problem?I have the car starting great now,But I cant get rid of the surge ,I stop at a light and I mean to tell you the car is a bucking bronco tach bounces around from 500 to 1000 it is anoying as hell....

monodax

What size stall are you running?

BuckeyeROC

iTrader: (7)

No, no, please don't take my question as a statement. I don't know what we need to do with it. I was just asking if we should change the 1200 and 1600, b/c with an M6 I'm trying to get it to idle at 1000 rpm, so it shouldn't see 400, 600 and 800 rpm too much. But it will see 1200 and 1600 and I wondered if we should scale back the values at those rpm's too.

Mine bucks too under 2000 rpm.

Pro Mouse

iTrader: (15)

I know BuckeyeRoc ,I am waiting for the HP Tuner experts to chime in before I do anymore changes....
Scott

2MuchRiceMakesMeSick

I am waiting as well. We installed the trex rex yesterday. Man that thing is violent. I LOVE IT. It started right up...but this tune did not work at all...Dies when you put it in gear

HumpinSS

iTrader: (1)

I thought all questions were answered? what other lingering questions are there

2MuchRiceMakesMeSick

My table looks like this
------------------------------------------------------
. . . . . . . . .400 . . .600 . .800 . .1000
0.08 g/cyl . . .11 . . .18 . . .24 . . .30
0.12 g/cyl . . .11 . . .18 . . .11 . . .30
0.16 g/cyl . . .11 . . .18 . . .24 . . .30
0.20 g/cyl . . .11 . . .18 . . .24 . . .30
0.24 g/cyl . . .10 . . .18 . . .25 . . .31
0.28 g/cyl . . .12 . . .18 . . .23 . . .28
0.32 g/cyl . . .14 . . .21 . . .22 . . .27
-------------------------------------------------------
5. Ignition --> High Octane Table: Add 2 deg to all points 400 to 1000 RPM, .08 to .32 g/sec

In this portion of tune I am suppost to add 2 to each value? I am assuming it is in degress.




I added 150 to each value wiht my In Gear AC Off values and it idles great. Did not die once. Thanks for all the help guys.

HumpinSS

iTrader: (1)

Yes you are supposed to add 2 degresss at those points

2MuchRiceMakesMeSick

Thanks. You guys are alot of help.

Can someone tell me what the ideal values are for a tune? Or is there no one set value?